---
id: CVE-2026-54506
title: >-
  Vvveb is a powerful and easy to use CMS with page builder to build websites,
  blogs or ecommerce stores
summary: >-
  Vvveb is a powerful and easy to use CMS with page builder to build websites,
  blogs or ecommerce stores. Prior to 1.0.8.5, app/controller/user/profile.php
  accepts the user[bio] field and passes stored content through sanitizeHTML()
  in sys…
severity: high
cvss: 7.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N'
cwe:
  - CWE-79
  - CWE-116
  - CWE-185
vendor: givanz
product: Vvveb
affected:
  - Vvveb < 1.0.8.5
published: '2026-09-17'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T20:17:11.123'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-54506'
references:
  - url: >-
      https://github.com/givanz/Vvveb/commit/20a01ef08559ffdc97205edeecde86c8ea27e567
    label: security-advisories@github.com
  - url: 'https://github.com/givanz/Vvveb/releases/tag/1.0.8.5'
    label: security-advisories@github.com
  - url: 'https://github.com/givanz/Vvveb/security/advisories/GHSA-5cg7-phhv-4qjr'
    label: security-advisories@github.com
  - url: 'https://github.com/givanz/Vvveb/security/advisories/GHSA-5cg7-phhv-4qjr'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-23T19:09:15.788977Z'
epss: 0.00313
epssPercentile: 0.21692
ingestedAt: '2026-09-17T22:30:21.399Z'
---

## Overview

Vvveb is a powerful and easy to use CMS with page builder to build websites, blogs or ecommerce stores. Prior to 1.0.8.5, app/controller/user/profile.php accepts the user[bio] field and passes stored content through sanitizeHTML() in system/functions.php, whose on* event-handler regular expression omits the forward-slash delimiter and whose do-while condition compares the string to itself, so forbidden nested tags are removed only once. An Author-role or higher user can submit solidus-prefixed event-handler markup or nested forbidden tags that survive sanitization. The stored bio is rendered without sufficient output encoding on /author/{username}, in the admin user-management view, and potentially in comment displays, causing attacker-controlled JavaScript to execute when unauthenticated visitors, administrators, or other users view the content. This can expose browser-session data and permit victim-context account actions, defacement, or phishing. This issue is fixed in version 1.0.8.5.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.